[Perl/perl5] 57803a: perl.h: define HAS_EXTENDED_OS_ERRNO

[Karl Williamson via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: 57803a28d15316e6f82c0ca757e9ad11cc08d4b0
      
https://github.com/Perl/perl5/commit/57803a28d15316e6f82c0ca757e9ad11cc08d4b0
  Author: Karl Williamson <k...@cpan.org>
  Date:   2023-08-08 (Tue, 08 Aug 2023)

  Changed paths:
    M embed.fnc
    M embed.h
    M perl.h

  Log Message:
  -----------
  perl.h: define HAS_EXTENDED_OS_ERRNO

on the systms that have it.